remove padding constant

[b95505017]

float outerRadius = ((size / 2) * 0.75f) * 0.937f;
float innerRadius = ((size / 2) * 0.75f) * 0.75f;

I think that some constants such as 0.75f could remove.
Let user control the paddings within bounds.

[Sefford]

You're right.

I have modified a little the behavior of the drawable. Now the ImageView size + padding is what decides the size of the outer ring, and you can control the size of the inner circle by using circleScale.

The difference is that now circleScale = 1.0 = outerRing Radius. I have incorporated also a Builder for the CircleProgressDrawable, as the constructor signature was starting to be too long and complex.

1.3 version with these changes is already available on Maven Central repo.

Thanks for the feedback! :)